boolean and moving door
Go in Edit mode -&gt; select your rdoor vertex group

Mesh -&gt; Separate -&gt; selection




delete your boolean modifier on door_cube.009

add a keyframe on frame 0 for your newly created door_cube.001 for location (from step 2)

go to frame 100

press G -&gt; y -&gt; -5.   Then keyframe location.

move your boolean modifier like so:




enjoy animation:

https://youtu.be/J0703WlP3oQ
i will delete the video, if you don't want me to show that.